72 research outputs found
Nuevas variedades de nogal de brotación tardía
No full textEl autor da a conocer siete formas de la especie Juglall.s regia L.
de brotación marcadamente retardada con respecto a las demás
cultivadas en la provincia de Mendoza, y se propone designarlas
con el nombre de su criador, acompañado del correspondiente
número de orden seguido en los estudios.The author describe seven forms of the species Juglans regia L. of the late sprouting.
Considering de special characteristics of one of them the author sugests the convenience of its cultivation under the name "Luis Roby Nº 7".Fil: Roby, Fernando.
Universidad Nacional de Cuyo. Facultad de Ciencias Agraria
Jokeby, a burlesque on Rokeby : a poem ... in six cantos /
No full textWritten by John Roby; erroneously ascribed to James Kirke Paulding. cf. O. Wegelin's Bibliography of the separate publications of James Kirke Paulding; Halkett & Laing; Notes & queries, 2d ser., v. 1, p. 257.Mode of access: Internet
Roby, Thomas W., IV, What to Do about Joseph Schwab and the Rabbis, Journal of the American Association for the Advancement of Curriculum Studies, 1(February, 2005).* Available online: http://www.uwstout.edu/soe/jaaacs/vol1/roby.htm
No full textReviews Schwab\u27s six papers on The Practical and tapes of his seminars on Jewish education (newly discovered); documents the author\u27s connection with Schwab; reviews Block\u27s book on Schwab\u27s debt to Judaic thought
Global Optimization of Low-Thrust Interplanetary Trajectories Using a Machine Learning Surrogate
No full textIn this work, we propose a new method to approximate the cost function of Low-Thrust, Multiple-Gravity-Assist interplanetary trajectories using a Machine Learning surrogate. We identified the computation time required to obtain training data as the main limitation when using Machine Learning methods for this purpose so we present a strategy to build the surrogate with limited training data. We built an Online-Sequential Extreme Learning Machine Multi-Agent System (OS-ELM-MAS) surrogate due to its theoretical good performance when the training data is limited. In addition, we define a method to include the surrogate during the optimization process that can be used with any gradient-free algorithm, and study the effect of several surrogate parameters on the optimization results. Finally, several interplanetary trajectories are optimized with and without the surrogate. Employing the surrogate results in up to 12% lower fuel cost values after a fixed optimization time. The parameters that control the interaction have to be carefully selected to achieve this improvement, and we show that the optimal value of these parameters can be narrowed down based on the characteristics of the transfers.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Astrodynamics & Space Mission
Improving the Evolutionary Optimization of Interplanetary Low-Thrust Trajectories Using a Neural Network Surrogate Model
No full textBuilding on recent advances in the fields of low-thrust trajectory optimization based on shaping methods, Artificial Neural Networks, and surrogate models in Evolutionary Algorithms, an investigation into a novel optimization routine is conducted. A flexible Python tool to evaluate linked trajectories in a two-body model based on hodographic shaping is implemented and used to develop a novel evolutionary optimization approach where a Genetic Algorithm is assisted in finding new candidate solutions by an online surrogate. The algorithm and different surrogate designs are experimentally investigated on two example problems based on the Dawn trajectory and the GTOC2 problem. Employing the surrogate yields new candidate solutions that improve the population’s fitness especially when the surrogate is used to approximate the shaping computation. Additionally, the use of a surrogate pretrained on a general data set of low-thrust transfers is tested and found to considerably improve the initial quality of the model, meaning that more good candidate solutions are found early on, accelerating the algorithm’s convergence.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Astrodynamics & Space Mission
Analisis pengaruh kualitas pelayanan dan kepuasan konsumen terhadap loyalitas pelanggan: studi kasus pada Raffa Car Wash Tangerang
No full textTujuan dari penelitian ini adalah untuk mengetahui pengaruh kualitas pelayanan dan kepuasan konsumen terhadap loyalitas pelanggan. Hasil penelitian ini menunjukkan bahwa terdapat pengaruh secara simultan pada variabel kualitas pelayanan dan kepuasan konsumen terhadap loyalitas pelanggan
PENGEMBANGAN EDUWISATA GARAM DI DESA BUNDER BAGI PEREKONOMIAN MASYARAKAT
No full textSalt tourism is one of the unique tours that offers natural scenery in the form of salt fields with piles of salt piled up. This tour is the first salt tour in Madura whis is located in Bunder Village, Pademawu District, Pamekasan Regency. Over time, tourism development is carried out by the manager, namely BUMDes Mutiara Saghara in the hope of increasing the number of visitors. However, the development process requires considerable costs. This must be in line with the benefits that will be obtained. The purpose of this study was to determine the impact of salt eduwisata development on the economy of the surronding community. This research uses a qualitative approach with purposive sampling technique. The results showed that many benefits were felt by the community with the presence of salt eduwisata. Wisata garam merupakan salah satu wisata unik yang menawarkan pemandangan alam berupa lahan garam dengan tumpukan garam yang menggunung. Wisata ini adalah wisata garam pertama di Madura yang berlokasi di Desa Bunder Kecamatan Pademawu Kabupaten Pamekasan. Seiring berjalannya waktu pengembangan wisata dilakukan oleh pengelola yaitu BUMDes Mutiara Saghara dengan harapan dapat menambah jumlah pengunjung. Akan tetapi, dalam proses pengembangannya membutuhkan biaya yang cukup besar. Hal ini harus sejalan dengan manfaat yang akan diperoleh. Tujuan penelitian ini adalah untuk mengetahui dampak pengembangan eduwisata garam bagi perekonomian masyarakat sekitar. Penelitian ini menggunakan pendekatan kualitatif dengan teknik pengambilan data secara purposive sampling. Hasil penelitian menunjukkan bahwa banyak manfaat yang dirasakan masyarakat dengan adanya eduwisata garam. 
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